Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same. Examples include melting ice or breaking a glass.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting iron or burning wood.

Front

What happens to the molecules in a solid when it melts?

Back

When a solid melts, its molecules gain energy and move apart, transitioning into a liquid state.

Front

What is the process of a liquid turning into a gas called?

Back

The process of a liquid turning into a gas is called evaporation.

Front

What is the process of a gas turning into a liquid called?

Back

The process of a gas turning into a liquid is called condensation.

Front

What state of matter has a definite shape and volume?

Back

Solid has a definite shape and volume.

Front

What state of matter has a definite volume but takes the shape of its container?

Back

Liquid has a definite volume but takes the shape of its container.

Front

What state of matter has no definite shape or volume?

Back

Gas has no definite shape or volume.

Front

True or False: Adding heat can change a solid to a liquid.

Back

True.

Front

True or False: Removing heat can change a gas to a liquid.

Back

True.